Swimming at the 2005 World Aquatics Championships – Women's 800 metre freestyle
# Swimming at the 2005 World Aquatics Championships – Women's 800 metre freestyle

The Women's 800 Freestyle event at the 11th FINA World Aquatics Championships swam 29 – 30 July 2005 in Montreal, Quebec, Canada. Preliminary heats were held in the Championships morning session on 29 July, with the top-8 finishers advancing to swim-again in the event's Final on 30 July.

At the start of the event, the existing World (WR) and Championships (CR) records were:

* WR: 8:16.22, Janet Evans (USA), swum 20 August 1989 in Tokyo, Japan
* CR: 8:23.66, Hannah Stockbauer (Germany), swum 26 July 2003 in Barcelona, Spain

Note: no new World or Championships records were set during this competition.

## Results

### Preliminary heats

| Rank | Heat + Lane | Swimmer | Nation | Time | Notes |
| - | - | - | - | - | - |
| 1 | H5 L7 | Brittany Reimer | Canada | 8:30.96 | q |
| 2 | H5 L5 | Ai Shibata | Japan | 8:30.98 | q |
| 3 | H4 L6 | Flavia Rigamonti | Switzerland | 8:33.34 | q |
| 4 | H4 L4 | Rebecca Cooke | Great Britain | 8:33.48 | q |
| 5 | H5 L2 | Jana Henke | Germany | 8:35.73 | q |
| 6 | H3 L4 | Kate Ziegler | United States | 8:35.81 | q |
| 7 | H4 L2 | Camelia Potec | Romania | 8:36.21 | q |
| 8 | H4 L5 | Erika Villaécija | Spain | 8:37.42 | q |
| 9 | H5 L6 | Sachiko Yamada | Japan | 8:37.70 | |
| 10 | H3 L2 | Laura Conway | United States | 8:37.90 | |
| 11 | H3 L3 | Linda Mackenzie | Australia | 8:38.27 | |
| 12 | H3 L6 | Lotte Friis | Denmark | 8:41.91 | |
| 13 | H4 L1 | Éva Risztov | Hungary | 8:42.81 | |
| 14 | H4 L7 | Elisa Pasini | Italy | 8:42.88 | |
| 15 | H5 L1 | Kristel Köbrich | Chile | 8:46.90 | |
| 16 | H5 L8 | Tanya Hunks | Canada | 8:47.55 | |
| 17 | H3 L5 | Simona Păduraru | Romania | 8:48.06 | |
| 18 | H3 L1 | Sophie Huber | France | 8:48.37 | |
| 19 | H2 L3 | Cecilia Biagioli | Argentina | 8:48.85 | |
| 20 | H4 L3 | Hua Chen | China | 8:49.46 | |
| 21 | H2 L4 | Olga Beresneva | Israel | 8:50.59 | |
| 22 | H2 L5 | Youn Jeong Seo | South Korea | 8:51.39 | |
| 23 | H5 L3 | Haylee Reddaway | Australia | 8:51.99 | |
| 24 | H3 L7 | Jingzhi Tang | China | 8:53.47 | |
| 25 | H2 L6 | Chin-Kuei Yang | Chinese Taipei | 9:07.25 | |
| 26 | H2 L2 | Paola Duguet | Colombia | 9:14.00 | |
| 27 | H1 L5 | Shrone Austin | Seychelles | 9:14.44 | |
| 28 | H2 L7 | Ting Wen Quah | Singapore | 9:20.93 | |
| 29 | H4 L8 | Wan-Tong Cheng | Chinese Taipei | 9:23.48 | |
| 30 | H1 L4 | Wan Ting Goh | Singapore | 9:32.68 | |
| - | H1 L3 | Ea Hyun Jung | South Korea | DNS | |
| - | H3 L8 | Teresia Gimholt | Sweden | DNS | |
| - | H5 L4 | Laure Manaudou | France | DNS | |

### Final heat

| Place | Swimmer | Nation | Time |
| - | - | - | - |
| | Kate Ziegler | USA | 8:25.31 |
| | Brittany Reimer | Canada | 8:27.59 |
| | Ai Shibata | Japan | 8:27.86 |
| 4 | Flavia Rigamonti | Switzerland | 8:28.74 |
| 5 | Camelia Potec | Romania | 8:34.40 |
| 6 | Erika Villaécija | Spain | 8:36.34 |
| 7 | Rebecca Cooke | Great Britain | 8:37.98 |
| 8 | Jana Henke | Germany | 8:38.23 |
